Originally Posted by Often1

Hopefully OP made it out of MCO long ago. But, because this is a public board and issues related to disabilities do occur, the following information may be helpful. Pretty much every carrier has a "desk" which handles special assistance and regularly handles requests such as OP's. Both EC 261/2004 and the ACCA have roughly similar requirements and both would require VS to accommodate a reasonable requirement, particularly when it simply involves shifting passengers around within a cabin.

In the case of VS, it has an entire section on its website and specifically advises passengers with seat assignment issues related to a disability to call a trained team. It is entirely possible that OP simply booked the seats he booked online, through customer service, or a TA. That would leave the seats "unflagged" and subject to reassignment.

To discuss the seats that could be best for you, give our Special Assistance team a call on 0344 412 4455 and they’ll do their best to give you the seat you need.

Further, if VS Special Assistance refused to help, every carrier operating out of the US is required to have a Complaint Resolution Officer (CRO) available at all times when there are terminal or flight operations. This need not be someone physically located at MCO and might well be someone located elsewhere and available by phone. But, a CRO must have training and the authority to order changes such as to seating. DOT rules require that one have exhausted the local option, so if at the check-in counter, one explains that one has a disability which makes one unable to walk up stairs, and is refused, simply ask the staff member to get a CRO on the line. More likely than not, that will generate a local manager and a seat reassignment for something as simple and standard as this.